Description Reviews MINI Leak Diagnosis Pump (DMTL) by Bosch #16-13-7-193-479. Brand New High Quality Aftermarket. Note: Check the wire harness right by the unit for rubbing or breakage. You will get a DMTL Pump Error Code if the wire harness has rubbed thru and has corrosion. We see this issue a lot, 75% Harness issues, 25% pump issues on average.